Messages in this thread | | | Date | Tue, 15 Sep 2015 10:35:52 +0200 | From | Pavel Machek <> | Subject | Re: System with multiple arizona (wm5102) codecs |
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Hi!
> > > I must confess I haven't ever tested a system with two Arizona > > > CODECs connected. Yes it seems you would get clashes on the > > > regulator names, I guess that would need to be fixed up. If you > > > were doing so wm831x-ldo.c would probably make a reasonable > > > example. > > > > > > I guess you would need to be careful with the machine driver as > > > well, you will need to use a snd_soc_codec_conf structure for at > > > least one (although I would do both) of the CODECs to give a > > > prefix for all the widget/control names, otherwise those will > > > clash and everything will probably behave very strangely. See > > > sound/soc/samsung/bells.c for an example doing this for wm9081. > > > > > > Those are the only two things that spring to mind at the moment > > > but keep me informed on how you are getting on and I will let you > > > know if I can come up with any other traps. > > > > It seems that davinci-evm takes data from device tree, but then uses > > statically-allocated evm_soc_card, which would lead to problems in > > dual-codec config....? > > That somewhat depends on how you plan on doing things. I had > assumed you would be having a single machine driver with both > CODECs connected to it, in which case the statically allocated > snd_soc_card wouldn't be a problem. However, if you wanted to > have two seperate machine drivers with a single CODEC connected > to each then you would have an issue. > > I guess either approach is reasonable and probably just depends > on what your end goal is.
The way dts is set up in my case, I ended up with two snd_soc_cards. It seems to work for me now (on old kernel and with some rather extreme hacks).
I'll most likely clean it up and get into mainline-ready form, but it will take some time. If you want to see the ugly patches, let me know.
Thanks and best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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